DE226948C - - Google Patents
Info
- Publication number
- DE226948C DE226948C DENDAT226948D DE226948DA DE226948C DE 226948 C DE226948 C DE 226948C DE NDAT226948 D DENDAT226948 D DE NDAT226948D DE 226948D A DE226948D A DE 226948DA DE 226948 C DE226948 C DE 226948C
- Authority
- DE
- Germany
- Prior art keywords
- contact
- spring
- microphone
- stream
- transmitter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 210000003813 thumb Anatomy 0.000 description 2
- 230000001151 other effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE280699T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE226948C true DE226948C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=6032349
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT280699D Active DE280699C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | |||
| DENDAT226948D Active DE226948C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT280699D Active DE280699C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Country Status (1)
| Country | Link |
|---|---|
| DE (2) | DE226948C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
-
0
- DE DENDAT280699D patent/DE280699C/de active Active
- DE DENDAT226948D patent/DE226948C/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE280699C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
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